git.sesse.net Git - xml-template/blob - python/xmltemplate.py

   1 #! /usr/bin/python
   2 import re
   3 import xml.dom.minidom
   4
   5 def process_file(filename, obj, clean = True):
   6         doc = xml.dom.minidom.parse(filename)
   7         process(doc, obj, clean)
   8         return doc
   9
  10 def process(node, obj, clean = True):
  11         if isinstance(obj, str):                        # overwrite
  12                 while not node.firstChild is None:
  13                         node.removeChild(node.firstChild)
  14                 doc = _get_document_element(node)
  15                 node.appendChild(doc.createTextNode(obj))
  16         elif isinstance(obj, xml.dom.Node):             # overwrite
  17                 pass
  18         elif isinstance(obj, dict):                     # substitute
  19                 for child in node.childNodes:
  20                         processed = False
  21
  22                         if child.nodeType == xml.dom.Node.ELEMENT_NODE:
  23                                 id = None
  24
  25                                 attrs = child.attributes
  26                                 if not attrs is None:
  27                                         for i in range(attrs.length):
  28                                                 attr = attrs.item(0)
  29                                                 if attr.namespaceURI == "http://template.sesse.net/" or attr.name == "id":
  30                                                         id = attr.value
  31                                                         if clean:
  32                                                                 child.removeAttribute(attr.name)
  33
  34                                 # check all substitutions to see if we found anything
  35                                 # appropriate
  36                                 for key in obj.keys():
  37                                         if key.startswith(child.tagName + "/"):
  38                                                 child.setAttribute(key.split("/")[1], obj[key])
  39                                         elif (not id is None) and key.startswith("#" + id + "/"):
  40                                                 child.setAttribute(key.split("/")[1], obj[key])
  41
  42                                         if not processed:
  43                                                 if key == child.localName or ((not id is None) and key == "#" + id):
  44                                                         process(child, obj[key], clean)
  45                                                         processed = True
  46
  47                         if not processed:
  48                                 process(child, obj, clean)
  49         elif isinstance(obj, list):                     # repeat
  50                 doc = _get_document_element(node)
  51                 frag = doc.createElement("temporary-fragment")     # ugh
  52
  53                 while not node.firstChild is None:
  54                         child = node.firstChild
  55                         node.removeChild(child)
  56                         frag.appendChild(child)
  57
  58                 for instance in obj:
  59                         newnode = frag.cloneNode(True)
  60                         node.appendChild(newnode)
  61                         process(newnode, instance, clean)
  62                         if clean:
  63                                 _clean(newnode)
  64
  65                 # remove all the <fragment> tags
  66
  67                 children_to_remove = []
  68                 for child in node.childNodes:
  69                         if isinstance(child, xml.dom.minidom.Element) and child.tagName == 'temporary-fragment':
  70                                 while not child.firstChild is None:
  71                                         child2 = child.firstChild
  72                                         child.removeChild(child2)
  73                                         node.appendChild(child2)
  74                                 children_to_remove.append(child)
  75
  76                 for child in children_to_remove:
  77                         node.removeChild(child)
  78
  79         if clean:
  80                 _clean(node)
  81
  82 def alternate(tag, array, *elems):
  83         return array
  84
  85 def _clean(node):
  86         if node.nodeType == xml.dom.Node.ELEMENT_NODE and node.namespaceURI == "http://template.sesse.net/":
  87                 # as this is a dummy node, we want to remove it and move everything further up
  88                 # after we've done any required replacements
  89                 doc = _get_document_element(node)
  90                 parent = node.parentNode
  91
  92                 while not node.firstChild is None:
  93                         child = node.firstChild
  94                         node.removeChild(child)
  95                         parent.insertBefore(child, node)
  96
  97                 parent.removeChild(node)
  98
  99 # ugh
 100 def _get_document_element(node):
 101         if node.parentNode is None:
 102                 return node
 103         else:
 104                 return _get_document_element(node.parentNode)